(19)
(11) EP 0 453 220 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.01.1993 Bulletin 1993/02

(43) Date of publication A2:
23.10.1991 Bulletin 1991/43

(21) Application number: 91303332.0

(22) Date of filing: 16.04.1991
(51) International Patent Classification (IPC)5: B29D 30/30
(84) Designated Contracting States:
DE ES FR GB IT

(30) Priority: 20.04.1990 JP 104691/90

(71) Applicant: Bridgestone Corporation
Tokyo 104 (JP)

(72) Inventors:
  • Nakajima, Tsuneharu
    Kodaira City, Tokyo (JP)
  • Tokunaga, Toshio
    Fuchu City, Tokyo (JP)
  • Nakashima, Hiroshi
    Kuroiso City, Tochigi Pref. (JP)

(74) Representative: Whalley, Kevin et al
MARKS & CLERK, 57-60 Lincoln's Inn Fields
London WC2A 3LS
London WC2A 3LS (GB)


(56) References cited: : 
   
       


    (54) Cord Winding apparatus


    (57) A cord winding apparatus is used for supplying and spirally winding a cord to and around an outer surface of a toroidal tire constituent member rotating about its axis. The apparatus includes a movable frame (20), a guide mechanism (24) for guiding a cord (C) paid out of an external bobbin, a supply roller (25) for supplying and pressing the cord introduced through the guide mechanism against the outer surface of the tire constituent member (1), a tension mechanism (50) for giving tensile force to the cord between the guide mechanism and the supply roller, a detection means (53) for detecting tensile force of the cord, and moving means (38) for moving the movable frame along the outer surface of the tire constituent member in its meridan direction, while keeping the cord between the supply roller and the guide mechanism always extending substantially along a normal (H) to the outer surface of the tire constituent member. The guide mechanism (24) includes a first roller (41) for guiding the cord, a rocking base (42) rockable about a substantially vertical rocking axis, and a second roller (44) for guiding the cord upstream of the first roller. An extension of the cord from the second roller (44) to the first roller (41) is coaxial to the rocking axis of the rocking base (42).






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